Resistance Of A Wire
...Investigation Research
Ohm, Georg Simon (1787-1854), German physicist, best known for his research on electrical currents. He was born in Erlangen and educated at the University of Erlangen. From 1833 to 1849 he was director of the polytechnic Institute of Nurnberg, and from 1852 until his death he was professor of experimental physics at the University of Munich. His formulation of the relationship between current, electromotive force, and resistance, known as Ohm's Law, is the basic law of current flow. The unit of electrical resistance was named the ohm in his honour. His theories stated that current flows in an electric circuit in accordance with several definite laws. The basic law of current flow is Ohm's law, named for its discoverer, the German physicist Georg Ohm. Ohm's law states that the amount of current flowing in a circuit made up of pure resistance's is directly proportional to the electromotive force impressed on the circuit and inversely proportional to the total resistance of the circuit. The rule is usually expressed by the formula I = E/R, where I is the current in amperes, E is the electromotive force in volts, and R is the resistance in ohms. Ohm's law applies to all electric circuits for both direct current (DC) and alternative current (AC), but additional principles must be invoked for the analysis of complex circuits and for AC circuits also involving inductance's and capacitance's.
Resistance, in electricity, property of any object or substance to resist or oppose the flow of an electrical current. The quantity of resistance in an electric circuit determines the amount of current flowing in the circuit for any given voltage applied to the circuit, according to Ohm's law. The unit of resistance is the ohm, the amount of resistance that limits the passage of current to one ampere when a voltage of one volt is applied to it. The...
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